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Unknown Bacillus

Unknown organism, possible Bacillus spp, seen on a hand print after hand washing. TSA plate was grown at 37 C for 24 hours then left at refrigerated temps for 4 weeks. Organism was a light brown and mat. The center of the growth was smooth with rhizoid like growth on the edges which were mucoid ... Read More

Swarming Proteus

Proteus on a CLED plate. How and why does it swarm? Read More

Typical "Poached egg" colony of Corynebacterium diphtheriae(biotype-mitis ) in tellurite blood agar.

Diphtheria an infection caused by Corynebacterium diphtheriae can be fatal at times, especially if it involves the respiratory tract. They multiply locally on mucous membrane, produce toxin causing necrosis of epithelial cells and ultimately form pseudomembranous coat. These pseudomembrane may ... Read More

Organism mix on a hand print

Mix of organism seen on a handprint/finger on TSA after incubation at 37 degrees for 24 hrs then held at refrigerated temperatures for 1 month. Read More

Shoe Swab Mix

his was a swab taken form the bottom of a shoe incubated for 48 hrs at 37 degrees C then held at room temp for 48 hrs then held at refrigerated temp's. A variety of colony morphology is seen, rhizoid, mucoid, etc. Image taken using transmitted light. Read More

Microbe Mafia

Meet the Microbe Mafia: K. rhizophila, E. coli, and C. xerosis. They might seem like friendly bacteria but are always looking for opportunities to cause disease. Well ..... K. rhiz is really not that bad but peer pressure works in bacterial populations as well. When armed with C. violaceum th... Read More

Bubbles

Pigmented agar, 5 days of cultivating, t' 5 Read More

Table Top Swab II

Swab taken from the lab table top and incubated on TSA for 48 hrs, left at room temperature for 72 hrs then held at refrigerated temperature for a month. Pictured is one of the resulting bacterial/fungal growths (yeast): Circular yellow colony, mucoid, with a donut like appearance
Read More

Air sampling

An air sampling done using an SDA agar in the business office.
Fungus is everywhere! Read More

Bacillus mycodies

Bacillus mycodies seen from an environmental swab grown on TSA at 37 degrees C for 49 hrs. Characteristic swirling rhizoid growth can be see. Read More

Christmas Agar Art_2016

Agar art using Bacillus sp. and Serratia marcescens on Luria agar. Read More

Shoe Swab III

This was a swab taken form the bottom of a shoe incubated for 48 hrs at 37 degrees C then held at room temp for 48 hrs then held at refrigerated temp's. Colony was yellow with rhizoid raised growth with a mat appearance. Image taken using transmitted light shooting through the agar to see the un... Read More

Happy New Year 4

Dear ASM,

It will be a great pleasure for me and my group if you can post on your Facebook page attached photo of Petri dishes.
A New Years way of examination of antimicrobial activity: Inflict on a Petri dish, a microorganism in the shape of a New Years tree, and then add some antibiotics.... Read More

Actinomycetes sub-cultured on Starch Casein Agar (SCA)

Pure colonies of Actinomycetes isolated from soil of Nepal sub-cultured on Starch Casein Agar (SCA) incubated for 1 week at 30 degree Celsius.
I am Sagar Aryal, Global Outreach Member of ASM, currently working as Teaching Assistant at St. Xavier's College, Kathmandu, Nepal. Read More

Oxidase Test

The oxidase test is performed using a reducing agent to detect bacteria’s ability to produce cytochrome c oxidase, an enzyme in the electron transport chain. The reducing agent (N,N,N′,N′-tetramethyl-p-phenylenediamine (TMPD)) changes or produces a purple color as it become oxidized. Pseudom... Read More

SECRETS IN THE SANDSTONE OF CAPITOL REEF NATIONAL PARK

After seeing living microbial mats forming stromatolites in Yellowstone in Part One, now we go back in time to the Jurassic period - hunting for microbial fossils in the desert of Utah. It's Part Two of the National Park anniversary series, live on the ASM blog! #NPS100 Read More

Micrococcus luteus on Blood agar

Micrococcus luteus, a G+ coccus, grown on blood agar for 48 hrs. Colonies are circular, entire, yellow and mucoid Read More

Two Lichens

Pictured are tow lichen's living on a wooden rail after heavy rains in the Santa Cruz hills. The branching lichen (Cladonia spp) is growing up through the flat lichen (Parmelia spp). Lichens are a fungus and algae or cyanobacteria, or both, that live and function as one organism in a symbiotic... Read More

Gram staining of Rhizobia

Gram staining of Rhizobia by Undergraduate student Rashtrapal Read More

Breaking a bacterial-made magnet apart

Currently, it is well established that prokaryotes possess cytoskeleton and organelles. This image depicts how magnetic organelles, magnetosomes, are properly partitioned and segregated by a mechanism that relies on the treadmilling of a dedicated cytoskeletal structure, the actin-like MamK fila... Read More
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